Need help on building a vintage audio system.

I am a complete newbee, but I have got speakers DCM Time Window that sparked me an idea to build an antire vintage audio system. i put my eyes to start off: Marantz 2215B or Mcintosh 4100. It has just happened that here's locally for sale one 4100 for around $650. I am going to look at it this morning.
Please, I need your guidance on how to do it in most proper way. I would love to be an enthusiast in the future, once I build a few systems.
My DCM speakers don't have anything spec wise wisible, only a serial number: 28788 and 28789 respectiely. I am posting pictures of them. Everyone's help is most appreciated.

Rule 1 don't post about a potential score until it's in your possesion. Yes I looked at your location but it's too far for me to go for my 2nd 4100 lol. That's a great price on the 4100 and it's a great start to your collection as well. That will run your DCM's quite nicely along with pretty much any other pair of speakers you'll acquire in your journey.

I bought some Time Windows about 4 months ago. Incredible. I'm done with all others. Per reviews at the time, despite their large size, they are especially effective in a smaller room which is where I have them.